Liner for cable-engaging tools



Nov. 15, 1927. ',-1,649,390

F. E. cRoTTo LINER FOR CABLE ENGAGING TOOLS Filed March 9. 1926 {cd/ a A Patented Nov. 15, 1927.

UNITED STATES ATENT OFF-ICE.

FRANK E. CBOTTO, OF TULSA, OKLAHOMA, ASSIGNOR TO WESTERN SUIPILY COMPANY,

' OF TULSA, OKLAHOMA, A CORPORATION OF OKLAHOMA.

LINER FOB CABLE-ENGAGING TOOLS.

Application filed March 9, 1926. Serial No. 93,378.

This invention relates to new and useful improvements in liners for cable engaging tools.

The invention has particularly to do with cable gripping tools such as are used in drilling wells. The gripping faces of such tools, are worn by the wire cable, particularly where the cable slips through the tool and abraids the gripping faces. Where the tool is divided into two or more sectors, the radius of the curved faces is constantly increased by the wear and the diameter of the opening in which the cable is received, is thus enlarged, whereby the tool gradually loses its gripping efficiency and makes replacing of the parts necessary at frequent intervals. Further, such curved faces do not wear'evenly and the cable opening thus soon becomes elliptical. In manipulating a tool, such as a wire line clamp, the cable is often sharply bent at the upper end, which breaks down the fibres thereof.

The object'of my invention is to provide liners of the type shown in my Letters Patent 1,531,597, issued March 31, 1925, for the gripping faces of cable gripping tools arranged to space the sectors of the tool apart whereby the wear is compensated by an inward radial adjustment of the sectors,-thus maintaining an eflicient grippingstructure until the liners are worn out, as well as preserving substantially the same diameter for the cable opening.

A further object is to provide liners having amplified gripping faces which present increased wearing areas, thus making for more even wear the efiiciency in gripping the cable.

An important object of the invention is to provide the liners with alternate interlocking lugs overlapping and overhanging each other along the vertical intersections of the liners, whereby continuous vertical edges, likely to pinch or cutthe cable, are obviated and more efficient gripping and wearing faces are provided.

Another object of the invention is to provide a funnel at the upper ends of the liners, shaped to support the cable in a wide are, when the latter is bent out of line.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily under the-liners,

be spaced apart so that they stood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown,and wherein:

Fig. 1 is an elevation of a set of liners constructed in accordance with my invention.

' Fig; 2 is a partial side elevation of one of the liners,

Fig. 3 is a face View of a portion of one of Fig. 4; 1s a plan view of the liners, and

Fig-5 is a horizontal cross-sectional view taken on the line 5-5 of Fig. 1.

In the drawings the numerals 10, 11 and 12 designate, respectively liners constructed in accordance with my invention. Each liner is substantially a'duplicate of the other and three are illustrated. Near its center each liner has a boss 13 on its rear side and said rear side is curved. or otherwise shaped to fit in the member with which it is used; while the boss is suitably tapped for receiving a fastening screw (not shown).

Each liner-has a curved face '14 and these faces constitute a cylindrical grip when the liners are assembled in the tool, as is indicated in Figs. Land :5. Inorder to compensatethe wear of these faces the liners must may be' adjusted inwardly and radially to a gripping diameter. It will lee-seen that if continuous vertical edges were provided on the margins of the faces of the liners, the cable might be pinched or out, upon the inward adjustment of the liners and also upon a closing movement of the members carrying said liners.

In order to overcome this condition each liner is provided with alternate sockets 15 and lugs 16'along each vertical side; the

sockets and lugs on one side being in staggered relation to those on the other side. The sockets are cut in the faces 14 and this leaves the lugs co-incident with the faces. When the liners are assembled the lugs of one engage in the sockets of the other, so as to overlap and overhang each other. The lugs and sockets are proportioned to allow for the radial adjustment of the liners so that said lugs will not fully seat in the sockets until the liners are adjusted inward to their least diameter. The alternate and sta gored relation of the interlocking lugs an sockets provides gripping faces which are substantially continuous vertically of looking gripping faces, rounded shoulder at its upper end and a.

the liners and, eliminate elongated vertical edges which would injure the cable.

Each liner has an enlarged and outwardly directed flanged head 17 at its upper end which is adapted to rest upon and extend above the member in which it is mounted. These liners may be used in connection with the wire line clamp shown in my Letters Patent l O. 1,482,460 issued February 5, 1924. One of the features of the present invention is a funnel at the top of the liners formed in the heads. The face 14 of each liner is merged at its upper end into a curved shoulder 18 which in turn is merged by an OG curve into a vertical wall 19 terminating at its upper end in a curved lip 20. The parts 18, 19 and 20 are of course curved horizontally and concentrically of the assembled liners. It is obvious that a cable clamped in the liners and bent to one side will be supported by the shoulder 18 and lip 20 of one of the slips, but will not contact with the wall 19. A cable so supported will be curved at such a wide are as to avoid a sharp bend and will be thus saved from injury.

Various changes in the size and shape of the different parts, as well as modifications and alterations may be made within the scope of the appended claims.

What I claim, is:

l. A cable gripping device comprising a plurality of elongated liners, each having a cylindrical gripping face interlocking with the face of the adjacent liner, each liner having a funnel member at its top integral therewith and forming part thereof.

2. In a cable gripping device, a plurality of elongated liners having cylindrical intereach liner having 3.

rounded lip above the shoulder and ofiset outwardly therefrom.

3. A liner for a cable gripping device having an elongated face curved transversely and provided along each side with sockets counter-sunk in said face and lugs between said sockets, the sockets along one side being in staggered relation to the sockets along the other side of the liner having a curved supporting shoulder and a curved lip offset outwardly from the shoulder.

4. A cable gripping device consisting of vertical sectors each having recesses along both vertical sides tical concaved gripping face, said gripping faces extending between the recesses and engaging in the complementary recesses of the adjacent sectors, whereby the gripping fac'es overlap, each sector forming less' than one half of the device circumferentially and being radially adjustable, whereby the sectors may be assembled with their faces in concentric relation and also overlapping and whereby said sectors may be moved radially with a slight variation in the concentric relation of their faces. V a

5. A cable gripping device consisting of a plurality of vertical sectors each forming less than half the device circumferentially and each having its outer surface formed in the arc of a circle, each sector having a vertical concaved gripping face and provided along each vertical side with staggered recesses terminating short of the outer surface of the sector, said sectors being movable radially in more than two directions and concentrically disposed.

and a head at the upper end r and provided with a ver- In testimony whereof I affix my signature.

FRANK n. oRorro. 

